Apparatus for turning over leaves, in particular sheets of music, comprising a turnover lever provided with a suction cup



Aug. 22, 1950 H. KOORING 2,519,

APPARATUS FOR TURNING OVER LEAVES, IN PARTICULAR SHEETS OF MUSIC, CQMFRISING A TURN-OVER LEVER PROVIDED WITH A SUCTION CUP 2 Sheets-Sheet 1 Filed June 26, 1948 INVENTORI H emd Y1K KQOMNQ A'T'FO R NE YS Aug. 22, 1950 H. KOORING 2,519,531

APPARATUS FOR TURNING OVER LEAVES, IN PARTICULAR SHEETS OF MUSIC, COMPRISING A TURN-OVER LEVER PROVIDED WITH A SUCTION CUP Filed June 26, 1948 2 Sheets-Sheet 2 IN V EN TOR.

H ctndvl'k Koorim cw wdwrh ATTORNEYS Patented Aug. 22, 1950 UNITED STATES'PATENT OFFICE dendrilr Kooling, Maracaibo, Venezuela Application June 2t, 1948, Serial No. 35,375 In the Netherlands April 15, 1948 3 Claims.

The invention relates to an apparatus for turning over leaves, in particular sheets of music, comprising a turn-over lever provided with a suction cup, which lever is adapted to move from an inoperative position into a leaf-engaging position and which may be swung from the latter into an intermediate position together with a leaf sucked by the suction cup, more or less according to the normal path described by ones hand when turning over a leaf, and which, after having released the leaf turned over may be moved from the intermediate position away from the leaf and may be swung back to the initial position. An apparatus of this kind is known from the German Patent Specification No. 431,460.

The purpose of the invention is to simplify the turn-over mechanism by making the action which in the case of the known apparatus is for the greater part mechanical, entirely or for the greater part pneumatic.

According to the known device, a treadle acts through a mechanical connection to operate a turnover lever. The turnover lever is moved from a normal position into a leaf-engaging position, from which it is swung together with the engaged leaf to an intermediate position and then returned to its original position. A piston is also actuated by the treadle movement, which applies suction to the suction cup at the proper time to hold the leaf in place on the turnover lever.

In the apparatus according to the invention all these movements are produced by suction. The invention namely consists in that the apparatus is provided with two tubes located alongside each other, the first tube being adapted to swing about a transverse shaft, and serving as a cylinder for a piston, which at a projecting part, constructed as a screw which part is adapted to move through the head of the cylinder constructed as a nut carries the turn-over lever which is substantially normal to the cylinder and pushes this lever inwards by suction in the cylinder and in doing so, by the screwing movement of the projecting part turns the turnover lever from the inoperative position into the leaf-engaging position, the second tube, which by means of a rod is hingedly connected with the first tube forming a second cylinder which is adapted to slide over a fixed guiding tube and owing to the above-mentioned hinged connection during its sliding movement caused by suction in the fixed tube swings the turn-over lever with its cylinder round the transverse shaft from the leaf-engaging position into the intermediate position.

According to the invention the apparatus has preferably been constructed in such a way that the cylinder in which the piston is located, carrying the turn-over lever, may telescope over a journal, which is adapted to swing round the transverse shaft and that the suction may also assert itself on the bottom of the cylinder, in such a way that under this suction the piston with the cylinder and turn-over lever is displaceable from the leaf-engaging position over a limited distance into a direction normal to the back of a leaf, i. e, into the direction of the transverse shaft.

An axial displacement of the turn-over lever sucked by the suction cup to the leaf will therefore precede the swinging movement. Hereby it is prevented that two leaves which might have stuck together are turned simultaneously. By means of the lateral translation movement the upper leaf is loosened from the leaf below. Only then the leaf is turned.

Pushing a leaf in transverse direction is known per se from the U. S. Patent Specification 1,846,097.

In order not to make the suction of the suction cup take place before the moment on which the leaf has to be sucked, according to the invention the apparatus may be constructed in such a manner that the piston enters into communication with the suction conduit only at or towards the moment of the screwing in movement, because of the fact that a bore in the piston which communicates with the suction cup moves opposite an opening or groove in the inner wall of the cylinder. The drawing illustrates the invention by means of an embodiment.

Fig. 1 is schematically a front view of a music (for a violin) to which an apparatus according to the invention has been mounted.

Fig. 2 gives a side view thereof.

Fig. 3 is on a larger scale, a view of the apparatus, as seen from the direction of the arrow III in Fig. 2.

Fig. l is a view on the same scale as Fig. 3, seen in the direction of the arrow IV in Fig. 2.

Figs. 5 and 6 are similar views of the parts being in other positions.

Fig. 7 is a view of the apparatus, the parts being in the position which has been reached after turning the leaf, but before the suction cup releases the page.

Figs. 8, 9 and 10 give a schematic illustration of some important positions of the suction cup and leaves.

According to Figs. 1 and 2 a rubber tube 2 is passed through a tube I of the music desk, the

lower end of which has been connected with a suction and force pump 3, which may be operated by means of a treadle 4. The other extremity of the tube is connected at 5 to a rubber tube 6, the endsof which are connected to the apparatus, of which a more detailed description will be given hereinafter, and which has been shown in its entirety indicated by l in Figs. 1 and 2. This apparatus is mounted on the desk 8. From the drawing is appears that it occupies a relatively small space and may be attached to the lower side of the supporting edge 9, on which the musicbook has to rest. Therefore it is also suited to be used when playing a piano or such like instrument.

In Figs. 3-7 the details of construction are shown. The apparatus comprises a tubular cylinder Ill-horizontal in mounted positionwhich at l I is connected to the tube 6, which cylinder is adapted to swing-round a transverse journal I2, which is attached to the supporting edge 9 of the music desk.

In the cylinder it there is a piston E3, the right end of which is constructed as a screw I4 with large pitch, which protrudes and may be moved helically through the head of the cylinder which is constructed as a nut and which passes into a radial arm [5, forming the turn-over lever and at its free end being provided with a suction cup 46. In the piston i3 is provided a transverse bore ll, which communicates with the atmosphere over a central channel in the piston, screw end and turn-over lever throughthe suction cup. In the inner wall of the cylinder Hi there is a groove ill, with which in a certain position of the piston the bore ll corresponds, so that the sucking action which prevails in the tube 2 is transmitted to the suction cup, when it is resting on a sheet of music. When the bore I? does not. coincide with the groove 58, a sucking action in the cylinder II] will pull the piston l3 to the left, whereby the screw i 4 will be screwed in, and therefore the displacement of. the piston will be accompanied by a rotation,. by which the turn-over lever [5, will be turned from the position of Fig. 3 into the position of Fig. 5, in which latter the suction cup will. lie against a sheet of music.

As a consequence of the fact that the cylinder I with the aid of a tubular shaped extremity 19, between which and thecylinder proper the bottom of. the cylinder 20 is located, is adaptedv to telescope over a journal 2|, which can swing round the pivot l2, when the piston !3 has been sucked and the turn-over lever l5 has been turned, the cylinder ill with turn-over lever ill will be moved over a small. distance to the left (out of the position of Fig. 5 into that of Fig. 6) whereby the suction cup 16 will correspondingly shift the engaged leaf to the left. This translating movement takes care that only one leaf at a time will be turned, whereby this leaf will first pass from the flat position of Fig. 8 into the somewhat bulged position of Fig. 9.

By the side of the cylinder lil (vide Figs. 3-6) and parallel thereto there is provided a cylinder 22, which is adapted to telescope over a tube 23, the internal of which 24 is connected with an opening 25, to which the tube 5 is connected. The sucking action in the tube 5 may therefore also be exerted on the cylinder 22. This cylinder ishingedly connected to the cylinder ill by means of an arm 26, in such a way that when the sucking action asserts itself in the cylinder 22which does not occur before the turning of the turnover lever and the translating movement of the cylinder Ill, because both these movements are easier to perform-this cylinder will be pushed to the left over the tube 23. Hereby, owing to the above-mentioned hinge connection with the cylinder Ill the latter is swung round the transverse journal l2 from the position of Fig. 6 into that of Fig. '7, whereby the suction cup It turns the leaf (vide also Fig. 10).

The arm '26 then runs against the pivot l2 acting as a stop;

Now if the sucking action is removed and pressure is exerted the leaf turned-over will be re leased by the suction cup, the turn-over lever is turned back and at the same time screwed out, whereby the suction cup with lever are turned away under the turned leaf and this leaf may lie flat on the preceding leaf. The compressed air then actuates the cylinder 22 and drives the same to the initial posiitcn according to Fig. 1, the cylinder Iii with turn-over lever being swung back by means of the lever 26. This backward movement by the kinetic energy of the turning and screwing out movement of the turn-over lever is thereby in a certain sense initiated and sustained, so that therefore the somewhat heavy beginning of'the swinging movement of the cylinder H] with accessories is better overcome by the cylinder 22.

Above an embodiment is described, the action of which is entirely pneumatic. The suction and force pump is placed on the floor, within reach of one of the feet, mostly the right foot of the person playing. If desired, this pump may serve for operating a duplex apparatus, which is mounted at the left and right of the middle of the music desk. The left apparatus is then intended for turning back a leaf turned over by the right apparatus. The pump may be constructed in such a way that by adjusting (with the foot) a valve or tap the pump cylinders may be connected with the left or right apparatus.

It is also possible to locate the pump higher and to operate the same by means of a Bowden cable.

I claim:

1. In an apparatus for turning over the leaves of a music folio or the like, a first piston and cylinder assembly, a second piston and cylinder assembly supported adjacent said first assembly, said second assembly being pivotally mounted adjacent one end thereof for swinging movement outwardly about said pivot away from said first assembly, pneumatic connections to the cylinders of said assemblies, means for applying a pressure different from atmospheric through said connections to said assemblies, a turn-over lever extending at right angles to the longitudinal axis of said second assembly and being connected to the piston thereof for movement therewith lengthwise of said assembly, said lever carrying a suction cup at the outer end thereof, means carried by the cylinder of said second assembly and responsive to a sliding movement of the piston thereof for imparting a turning movement to said lever, means for establishing a pneumatic connection between said suction cup and the cylinder space of said second assembly, a link member pivotally connected at one end to the longitudinally movable member of said first piston and cylinder assembly and at the opposite end thereof pivotally connected to said second assembly, said. lever being responsive to longitudinal movement of said longitudinally movable member to act upon said second assembly to swing the same outwardly about said pivot.

2. In an apparatus for turning over the leaves of a music folio or the like, a first piston and cylinder assembly, a second piston and cylinder assembly supported adjacent said first assembly. said second assembly being mounted adjacent one end thereof on a support permitting limited movement of said assembly lengthwise thereof, said support being pivotally mounted for swinging movement outwardly about said pivot away from said first assembly, pneumatic connections to the cylinders of said assemblies, means for applying a pressure difierent from atmospheric through said connections to said assemblies, 2. turn-over lever extending at right angles to the longitudinal axis of said second assembly and being connected to the piston thereof for movement therewith lengthwise of said assembly, said lever carrying a suction cup at the outer end thereof, means carried by the cylinder of said second assembly and responsive to a sliding movement of the piston thereof for imparting a turning movement to said lever, means for establishing a pneumatic connection between said suction cup and the cylinder space of said second assembly, a link member pivotally connected at one end to the longitudinally movable member of said first piston and cylinder assembly and at the opposite end thereof pivotally connected to said second assembly, said link being responsive to longitudinal movement of said longitudinally movable member to impart a limited bodily movement of said second assembly toward the pivotal support therefor and, and on continuation of said longitudinal movement, acting upon said second assembly to swing the same outwardly about said pivot.

3. In an apparatus as claimed in claim 1, means for controlling the application of suction through said suction cup comprising pneumatic connection extending between the suction cup and the confined space located between the piston and the head of the cylinder of the said second piston and cylinder assembly, and said cylinder adjacent the end opposite the head thereof having a groove in the inner side wall thereof extending lengthwise of said cylinder to establish a bypass connection around said piston between said confined space and the connection leading to the suction-applying means.

HENDRIK KOORING.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,037,175 Fraser Aug. 27, 1912 1,166,803 Albert Jan. 4, 1916 1,214,110 Albert Jan, 30, 1917 FOREIGN PATENTS Number Country Date 20,024 Great Britain Sept. 19, 1896 153,022 Great Britain July 21, 1921 

